Transient Waveform Recorder System

Data Acquisition System Documentation

Summer Season
(Dec 2001 ~ Feb 2002)

Pole Team

Wolfgang Wagner

Thomas Feser

Yuan Yan

Steve Barwick

The Transient Waveform Recorder System is designed to extend the integrated
dynamic range by approximately a factor of 100, relative to the standard
AMANDA DAQ. The added capability should improve the energy resolution and
background rejection for high energy phenomena, including the search for
EHE nu's in the downgoing direction, the search for high energy cascades,
and GRBs. The goal is to assess the performance and reliability. If the
results are encouraging, the plan is to extend the system to all channels.
(Since the new capabilities are so advanced, maybe the new configuration
with all channels connected to TWR should be changed to "AMANDA-XE"
(for eXtreme Energy),
the successor of AMANDA-II ;-)

The following links show figures of the electrical and computer
connections for the Transient Waveform Recorder DAQ at the end of the Feb
2002 summer campaign. The prototype system was installed in Jan. 2002.
The electrical waveforms were taken from the spare fast output of the ORM/ORB.
All TWR channels are connected to fiber optic channels. The Laser Diode
dAOMs are connected to an ORM with only one fast out. Therefore, to keep
these channels in the muon DAQ, we inserted a linear fan out (linear to
-3V, Vout/Vin ~ 0.85, AC coupled with 6us decay time).